Thermal entanglement and teleportation in a three-qubit Heisenberg XXZ model with Dzyaloshinski-Moriya anisotropic antisymmetric interaction  

作　　者：谢利军 张登玉 唐世清 詹孝贵 高峰 

机构地区：[1]Faculty of Material and Photoelectronic Physics,Xiangtan University [2]Department of Physics and Electronic Information Science,Hengyang Normal University

出　　处：《Chinese Physics B》2009年第8期3203-3209,共7页中国物理B（英文版）

基　　金：supported by the Natural Science Foundation of Hunan Province (Grant No 06JJ50118);the National Natural Science Foundation of China (Grant Nos 10604053 and 10874013)

摘　　要：This paper investigates the thermal pairwise entanglement of a three-qubit Heisenberg XXZ chain in the presence of the Dzyaioshinski-Moriya （DM） anisotropic antisymmetric interaction and quantum teleportation when using the Heisenberg chain as a channel. The entanglement dependences on the DM interaction and temperature are given in detail. It obtains the relation between the concurrence and average fidelity, and shows that the same concurrence can lead different average fidelities. Moreover, it finds the thermally entangled states which do not violate the Bell inequalities, and can still be used for quantum teleportation.This paper investigates the thermal pairwise entanglement of a three-qubit Heisenberg XXZ chain in the presence of the Dzyaioshinski-Moriya （DM） anisotropic antisymmetric interaction and quantum teleportation when using the Heisenberg chain as a channel. The entanglement dependences on the DM interaction and temperature are given in detail. It obtains the relation between the concurrence and average fidelity, and shows that the same concurrence can lead different average fidelities. Moreover, it finds the thermally entangled states which do not violate the Bell inequalities, and can still be used for quantum teleportation.

关 键 词：quantum teleportation CONCURRENCE fidelity Bell inequality violation 

分 类 号：O413.1[理学—理论物理]